syzkaller login: [ 31.566736] BUG: Bad rss-counter state mm:00000000eb9162ac type:MM_FILEPAGES val:33 [ 31.569034] BUG: Bad rss-counter state mm:00000000eb9162ac type:MM_ANONPAGES val:22 [ 31.733123] ================================================================== [ 31.734237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.735506] Read of size 8 at addr ffff88800f15edf0 by task sshd/221 [ 31.736431] [ 31.736693] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.737738] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.738878] Call Trace: [ 31.739250] [ 31.739580] dump_stack_lvl+0x91/0xf0 [ 31.740156] print_report+0xcc/0x620 [ 31.740728] ? __virt_addr_valid+0x102/0x340 [ 31.741385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.742110] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.742835] kasan_report+0xbe/0xf0 [ 31.743397] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.744141] vma_interval_tree_remove+0xc75/0xec0 [ 31.744870] vma_prepare+0xc54/0x11a0 [ 31.745457] __split_vma+0x5af/0x950 [ 31.746017] ? __pfx___split_vma+0x10/0x10 [ 31.746648] ? find_held_lock+0x2c/0x110 [ 31.747277] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.747948] ? lock_is_held_type+0x9f/0x120 [ 31.748592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.749327] ? mtree_range_walk+0x632/0x900 [ 31.749992] ? mas_walk+0x5c7/0x7c0 [ 31.750561] do_vmi_munmap+0x1f1/0x2b0 [ 31.751149] mmap_region+0x1f9/0x2660 [ 31.751724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.752337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.753183] ? __pfx_lock_acquire+0x10/0x10 [ 31.753818] ? __pfx_mmap_region+0x10/0x10 [ 31.754454] ? security_mmap_addr+0x7d/0xa0 [ 31.755085] ? get_unmapped_area+0x1f5/0x3f0 [ 31.755737] do_mmap+0x854/0xf00 [ 31.756269] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.756857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.757552] ksys_mmap_pgoff+0x3af/0x500 [ 31.758154] do_syscall_64+0x3f/0x90 [ 31.758723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.759508] RIP: 0033:0x7f4af5b43d82 [ 31.760050] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.762607] RSP: 002b:00007ffdf4636648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.763681] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4af5b43d82 [ 31.764692] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4af4f7d000 [ 31.765717] RBP: 00007f4af4f7d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.766742] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e237c2f70 [ 31.767748] R13: 00007ffdf4636660 R14: 00007ffdf4636690 R15: 00007ffdf46369f0 [ 31.768782] [ 31.769129] [ 31.769410] Allocated by task 214: [ 31.769925] kasan_save_stack+0x22/0x50 [ 31.770524] kasan_set_track+0x25/0x30 [ 31.771115] __kasan_slab_alloc+0x59/0x70 [ 31.771748] kmem_cache_alloc+0x16b/0x370 [ 31.772368] vm_area_dup+0x20/0x160 [ 31.772905] __split_vma+0x170/0x950 [ 31.773468] split_vma+0xc6/0x110 [ 31.773993] mprotect_fixup+0x8d2/0xb30 [ 31.774599] do_mprotect_pkey+0x87e/0xd40 [ 31.775219] __x64_sys_mprotect+0x78/0xc0 [ 31.775834] do_syscall_64+0x3f/0x90 [ 31.776478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.777229] [ 31.777499] Freed by task 214: [ 31.777960] kasan_save_stack+0x22/0x50 [ 31.778536] kasan_set_track+0x25/0x30 [ 31.779107] kasan_save_free_info+0x2b/0x50 [ 31.779724] __kasan_slab_free+0x10a/0x190 [ 31.780347] kmem_cache_free+0x10d/0x4d0 [ 31.780940] rcu_core+0x8c8/0x2860 [ 31.781467] __do_softirq+0x1b7/0x7d4 [ 31.782019] [ 31.782266] Last potentially related work creation: [ 31.782937] kasan_save_stack+0x22/0x50 [ 31.783516] __kasan_record_aux_stack+0x8e/0xa0 [ 31.784186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.784940] remove_vma+0x139/0x170 [ 31.785500] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.786161] do_vmi_munmap+0x1f1/0x2b0 [ 31.786785] __vm_munmap+0x138/0x3a0 [ 31.787365] __x64_sys_munmap+0x59/0x80 [ 31.787990] do_syscall_64+0x3f/0x90 [ 31.788591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.789423] [ 31.789693] The buggy address belongs to the object at ffff88800f15ed98 [ 31.789693] which belongs to the cache vm_area_struct of size 168 [ 31.791466] The buggy address is located 88 bytes inside of [ 31.791466] freed 168-byte region [ffff88800f15ed98, ffff88800f15ee40) [ 31.792912] [ 31.793137] The buggy address belongs to the physical page: [ 31.793829] page:000000006338086c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf15e [ 31.794934] memcg:ffff8880166b4e01 [ 31.795373] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.796039] page_type: 0xffffffff() [ 31.796506] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.797471] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166b4e01 [ 31.798409] page dumped because: kasan: bad access detected [ 31.799088] [ 31.799310] Memory state around the buggy address: [ 31.799911] ffff88800f15ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.800787] ffff88800f15ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.801682] >ffff88800f15ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.802546] ^ [ 31.803376] ffff88800f15ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.804262] ffff88800f15ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.805143] ================================================================== [ 31.806167] Disabling lock debugging due to kernel taint [ 34.143861] BUG: Bad rss-counter state mm:000000009bdca187 type:MM_FILEPAGES val:33 [ 34.145366] BUG: Bad rss-counter state mm:000000009bdca187 type:MM_ANONPAGES val:22 [ 34.674801] BUG: Bad rss-counter state mm:00000000dfe4407a type:MM_FILEPAGES val:33 [ 34.675962] BUG: Bad rss-counter state mm:00000000dfe4407a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55686' (ECDSA) to the list of known hosts. 2023/06/20 19:28:43 fuzzer started 2023/06/20 19:28:44 dialing manager at localhost:36067 2023/06/20 19:28:44 checking machine... 2023/06/20 19:28:44 checking revisions... [ 35.292456] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:28:44 testing simple program... [ 35.333333] cgroup: Unknown subsys name 'net' [ 35.410240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:28:43 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c1324 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09910 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-PC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8eb5b9d900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=000055be5ac65768 CR3=000000000dca8000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=bdd4db1c00240eb3104fc8693e8142c0 XMM02=000000000011b0b0eff9b2d0a8fce9cb XMM03=000000000011b1802c67c8bc2e329bc3 XMM04=0efd33506d068f9700000000000ae988 XMM05=944bae6fc2bcc5390000000000132de8 XMM06=c291bd5c70af25b90000000000131e88 XMM07=fb795ef6d657705600000000001221b8 XMM08=2c67c8bc2e329bc3000000000011b120 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd06461978 CR3=0000000005482000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f9a166ae5100000556502e6c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000